I can't say for sure that these are the real deal, but it would be highly unlikely that they are fake. IE8s or Monsters I can see faked, but there really isn't a big enough market for fake Panasonic headphones that it would be worth the counterfeiting process to produce them. Just my opinion.

Also, I have been thinking about getting these for a while and held off, purchasing the Phiaton PS 210s instead (because they're hella-fun!). In my search I found them on Amazon for $89 for a while. It looks like they just sold out of them days ago. If you have any fears about an eBay purchase I would recommend waiting a little longer to see if they come back into inventory on Amazon or elsewhere.